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Finding the Fourth Proportional to 71,358,425.80, 107,027,141.10 and 20,245,611.40

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Solution

The fourth proportional to 71,358,425.80, 107,027,141.10 and 20,245,611.40 is: 30,365,438.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,358,425.80 : 107,027,141.10 = 20,245,611.40 : x
  2. Step 2: Convert to fraction form
    71,358,425.80/107,027,141.10 = 20,245,611.40/x
  3. Step 3: Cross multiply
    71,358,425.80x = 107,027,141.10 × 20,245,611.40
  4. Step 4: Simplify right side
    71,358,425.80x = 2,166,829,907,963,568.25
  5. Step 5: Solve for x
    x = 2,166,829,907,963,568.25/71,358,425.80
  6. Step 6: Final answer
    x = 30,365,438.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.